
Kansas City Royals vs. Seattle Mariners
Prediction market · Polymarket
Overview
In the upcoming MLB game between the Kansas City Royals and Seattle Mariners, scheduled for May 1 at 9:45PM ET: This market will resolve to "Kansas City Royals" if the Kansas City Royals win the game. This market will resolve to "Seattle Mariners" if the Seattle Mariners win the game. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.
Ticker
mlb-kc-sea-2026-05-01
Volume
7.2K
24h volume
7.1K
1w volume
7.2K
Open interest
1.0K
Liquidity
181.0K
Liquidity CLOB
181.0K
Start
Apr 25, 2026
End
May 9, 2026
Status
Active
Access
Restricted
Created
May 2, 2026
Resolution source
https://www.mlb.com/
Event ID
416713
Slug
mlb-kc-sea-2026-05-01
Markets
2
Raw event data
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"ticker": "mlb-kc-sea-2026-05-01",
"slug": "mlb-kc-sea-2026-05-01",
"title": "Kansas City Royals vs. Seattle Mariners",
"description": "In the upcoming MLB game between the Kansas City Royals and Seattle Mariners, scheduled for May 1 at 9:45PM ET:\n\nThis market will resolve to \"Kansas City Royals\" if the Kansas City Royals win the game.\n\nThis market will resolve to \"Seattle Mariners\" if the Seattle Mariners win the game.\n\nIf the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50.\n\nThe primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.",
"resolutionSource": "https://www.mlb.com/",
"startDate": "2026-04-25T13:09:49.625844Z",
"creationDate": "2026-05-02T01:45:00Z",
"endDate": "2026-05-09T01:45:00Z",
"image": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Repetitive-markets/MLB.jpg",
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"active": true,
"closed": false,
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"featured": false,
"restricted": true,
"liquidity": 180956.2104,
"volume": 7241.112177,
"openInterest": 1002.618844,
"createdAt": "2026-04-25T13:00:46.095276Z",
"updatedAt": "2026-05-01T03:08:56.255399Z",
"competitive": 0.9975062344139651,
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"volume1mo": 7241.112177,
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"enableOrderBook": true,
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"negRisk": false,
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"question": "Kansas City Royals vs. Seattle Mariners",
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"resolutionSource": "https://www.mlb.com/",
"endDate": "2026-05-09T01:45:00Z",
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"description": "In the upcoming MLB game between the Kansas City Royals and Seattle Mariners, scheduled for May 1 at 9:45PM ET:\n\nThis market will resolve to \"Kansas City Royals\" if the Kansas City Royals win the game.\n\nThis market will resolve to \"Seattle Mariners\" if the Seattle Mariners win the game.\n\nIf the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50.\n\nThe primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.",
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"outcomePrices": "[\"0.405\", \"0.595\"]",
"volume": "7428.5512",
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"marketMakerAddress": "",
"createdAt": "2026-04-25T13:00:46.222919Z",
"updatedAt": "2026-05-01T03:08:00.436136Z",
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"gameStartTime": "2026-05-02 01:45:00+00",
"secondsDelay": 1,
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"umaReward": "2",
"volume24hrClob": 7325.82507,
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"volume1moClob": 7428.5512,
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"makerBaseFee": 1000,
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"customLiveness": 1800,
"acceptingOrders": true,
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"ready": false,
"funded": false,
"acceptingOrdersTimestamp": "2026-04-25T13:03:44Z",
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"rewardsMaxSpread": 2.5,
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"bestBid": 0.4,
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"automaticallyActive": true,
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"sportsMarketType": "moneyline",
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"pendingDeployment": false,
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"deployingTimestamp": "2026-04-25T13:01:04.858674Z",
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"holdingRewardsEnabled": false,
"feesEnabled": true,
"requiresTranslation": false,
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"feeSchedule": {
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"rate": 0.03,
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{
"id": "2077481",
"question": "Will there be a run scored in the first inning?: Kansas City Royals vs. Seattle Mariners",
"conditionId": "0x54f2434874f33c0316e809624dc3eb242b770ca3731ab1e228c9ba4eebe7fe7b",
"slug": "mlb-kc-sea-2026-05-01-nrfi",
"resolutionSource": "https://www.mlb.com/scores",
"endDate": "2026-05-09T01:45:00Z",
"liquidity": "894.1436",
"startDate": "2026-04-25T13:03:34.306975Z",
"image": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Repetitive-markets/MLB.jpg",
"icon": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Repetitive-markets/MLB.jpg",
"description": "In the upcoming MLB game between the Kansas City Royals and Seattle Mariners, scheduled for May 1 at 9:45 PM ET:\n\nThis market will resolve to \"Yes\" if at least one run is scored in the 1st inning by either the Kansas City Royals or Seattle Mariners.\n\nThis market will resolve to \"No\" if no runs are scored in the 1st inning by either team.\n\nIf the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50.\n\nTo know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game.\n\nThe primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.",
"outcomes": "[\"Yes\", \"No\"]",
"outcomePrices": "[\"0.45\", \"0.55\"]",
"active": true,
"closed": false,
"marketMakerAddress": "",
"createdAt": "2026-04-25T13:00:46.392331Z",
"updatedAt": "2026-05-01T03:08:18.801937Z",
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"resolvedBy": "0x65070BE91477460D8A7AeEb94ef92fe056C2f2A7",
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"groupItemThreshold": "3",
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"liquidityNum": 894.1436,
"endDateIso": "2026-05-09",
"startDateIso": "2026-04-25",
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"gameStartTime": "2026-05-02 01:45:00+00",
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"acceptingOrdersTimestamp": "2026-04-25T13:02:30Z",
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"ticker": "mlb",
"slug": "mlb",
"title": "MLB",
"seriesType": "single",
"recurrence": "daily",
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"icon": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Repetitive-markets/MLB.jpg",
"layout": "default",
"active": true,
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"tags": [
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"showAllOutcomes": true,
"showMarketImages": false,
"enableNegRisk": false,
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"startTime": "2026-05-02T01:45:00Z",
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"eventMetadata": {
"context_description": "Seattle Mariners host the Kansas City Royals in a series opener at T-Mobile Park, where trader consensus hinges on the pitching matchup of Bryan Woo (1-2, 3.86 ERA) versus Cole Ragans (1-4, 5.00 ERA), with Woo's stronger command giving Seattle a home-field edge amid their 16-16 record compared to Kansas City's sluggish 12-18 start. Royals infielder Maikel Garcia suffered an apparent injury in yesterday's game, clouding their infield defense, while Victor Robles remains sidelined on the Mariners' 10-day IL with a pectoral strain. Ragans impressed last outing with 11 strikeouts over six innings, but both bullpens rank middling. Mariners hold a slight head-to-head advantage recently; dome play negates weather factors.",
"context_requires_regen": true,
"context_updated_at": "2026-05-01T01:56:16.358Z"
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"teams": [
{
"id": 114208,
"name": "Kansas City Royals",
"league": "mlb",
"record": "12-19",
"logo": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Kansas City Royals-3bcec54a2a.png",
"abbreviation": "kc",
"alias": "Royals",
"createdAt": "2025-03-31T18:20:34.051129Z",
"updatedAt": "2026-03-24T06:07:21.090964Z",
"providerId": 5,
"color": "#004A93"
},
{
"id": 114215,
"name": "Seattle Mariners",
"league": "mlb",
"record": "16-16",
"logo": "https://polymarket-upload.s3.us-east-2.amazonaws.com/Seattle Mariners-af6bcbe9a0.png",
"abbreviation": "sea",
"alias": "Mariners",
"createdAt": "2025-03-31T18:20:34.051129Z",
"updatedAt": "2026-03-27T09:00:01.961211Z",
"providerId": 13,
"color": "#004D96"
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]
}- Will there be a run scored in the first inning?: Kansas City Royals vs. Seattle MarinersVol —Liq 894End May 9, 2026OpenOrder book
- Kansas City Royals vs. Seattle MarinersVol 7.4KLiq 238.2KEnd May 9, 2026OpenOrder book